Day time temperatures tomorrow are forecast at between four and 20 degrees with maximums of between 22 and 23 degrees later in the week.

"Looking at low temperatures, (the coming days) maybe won't be quite as cold as it was this morning, we're looking at four degrees tomorrow morning and moving back up towards seven or eight in the next couple of days so it's the coldest for the next few mornings will be just tomorrow," Mr Bernard said.

"We had a bit of a south-westerly change yesterday which brought slightly cooler air over us hence the cool forecast max of 20 degrees and that air was also particularly dry so as the wind dropped down overnight, it allows the temperatures to fall quite dramatically."